Bowling-pin and method of making same.



F. G. CRANE. BOWLING PIN AND METHOD OF MAKING SAME.

APPLICATION FILED JAN. 5, I916. I

Patented M23 22, 1917.

S C I PATENT OF g C FBANK G. CHAN E,

or wns'r oomlmaswoa'rmnnw- JERSEY, ASSIGNOR or ONE-HALF T JULIUS BALKE, OF CHICAGO, ILLINOIS.

BOWLING-PIN AND METHOD OF MAKING SAME.

Specification of Letters Patent.

Patented May22, 1917.

Application filed January 5, 1916. Serial No. 70,358.

To an whom it may concern:

Same, of whichthe following is a specifica- I tion.

This invention relates to pins for use on bowling alleys and to a novel method of making same; 7

While bowling pins constructed from various materials have been suggested from time to time, so far as applicant is aware, no

'pin has previously been devised which will successfully replace the wood pinsnow universally used. Wood pins are, however, subject to numerous disadvantages, among which are high cost, owing to the rapid depletion of supplies of wood suitable for the purpose and lack of durability, owing to the inherent liability of wood to split, check, splinter and warp.

It is an object of my invention to provide a bowling pin which overcomes the inherent defects of wood pins and which is at the same time inexpensive and durable.

A further object of my invention is the provision of a bowling pin constructed of paper or similar material, which is capable of receiving and retaining the exact. form required in a standard bowling pin as well as a suitable finish which will make it pleasing to the eye and, therefore, acceptable to replace wood ins.

Astill furt er object of my invention is the provision of a method ofv making bowling pins from paper or other similar material, whereby pins having allof the advantages of wood pins without the defects thereof may be readily and cheaply constructed. v

Other, objects and advantages of my invention will be apparent as it is better understood by reference to the following specificationwhen read in connection with the accompanying drawing in which-- Figure 1 is an elevation of a finished blank from which the pin is turned;

Fig. 2 is an elevation partially in section of a finished pin;

Fig. 3 is a horizontal section through the pin illustrated in Fig. 2;

Fig. 4 is an elevation partially in section substantially solid body,

of a pin illustrating a slightly different form of my invention;

Fig. 5 is a similar view, illustrating another form of my invention;

Fig. 6 is a vertical section through a portion of a pin, showing a reinforcing member attached tothe base thereof, and

Figs. 7 and 8 are horizontal sections illustrating the slightly different arrangements of the paper comprising the body of the pin.

Referring to the drawing, 1 indicates .a substantially cylindrical blank which is first prepared by winding a strip of paper or other suitable material of a similar character upon a mandrel 2 which may be removable or, if desired, may form the permanent V core of the pin. The paper may be sized or unsized, but is preferably unsized in order that the binder, which preferably consists of concentrated waste-sulfite liquor, may impregnate the paper. The binder is applied as a coating to the paper before the latter is wound upon the mandrel 2 and while sulfite liquor has proved most satisfactory for the purpose it is to be understood that other adhesives, such for example as glue or dextrin may be substituted therefor. The paper may be wound in a continuous strip 3, as indicated in Fig. 3, or, if desired, it may be applied in the form of separate sheets 4, as indicated in Fig. 7, or as separate previously formed cylindrical members 5 of increasing diameter which, when assembled and secured by means of adhesive, provide a as shown in Fig. 8.

When the blank 1 has been completed, as

described, the mandrel 2 is preferably withdrawn and the blank is put aside and allowed to dry naturally, it being understood that the drying operation may be accelerated in any suitablemanner, if desired. The object of removing the mandrel 2 is to allow the blank to dry both from the exterior and interior thereof, but it will be obvious that the mandrel 2 may constitute the permanent wooden core of the pin and need not necessa-rily be withdrawn before the drying operation. When the drying has been completed the permanent wooden core 5 is inserted, if the mandrel has previously been withdrawn, and the blank 1 is placed in a lathe and turned to form the pin 6 of standard shape and size, as indicated in Fig. 2. The pin is then coated with an elastic moisit a suitable finish and protects it from moisture.

It is sometimes desirable that the head of the pin be of wood and I have, therefore, illustrated in Fig. 4 a form of my improved pin in which the body portion 7 is composed of paper, as previously described, and the wood core 8 is provided with an enlarged portion 9 which forms the head of the pin. The core 8 is secured in any suitable manner to the body portion 7 and, if desired, a metal weight 10 may be inserted in the base or at any other .point within the space reserved for the 'core 8 of the. pin so that the center of gravity may be shifted as desired.

In order to lighten the pin it may be desirable, as illustrated in Fig. 5, to increase the diameter of the opening 11 Within the body 12- of the pin andthis may be readily accomplished by winding the paper about a collapsible mandrel which is removed subsequently to the winding operation as be fore. Suitable plugs 13 are secured at the top and bottom of the opening 11, so that the pin-has the appearance of being solid. It is to be understood that the length of the plugs 13, as shown in Fig. 5, is illustrative merely and that the plugs may be of any desired length and of wood or metal in order that the center of gravity of the pin may be shifted as desired.

In- Fig. 6 of the drawing I have illustrated a form of my invention in which the bottom of the pin is replaced by a plug 14 of fiber or other suitable material which provides a better wearing surface at the portion of the pin which is subjected to the greatest amount of wear. The body of the pin comprises the layers 3 of paper and the core 5 of wood, as described in connection with Fig. 2, but it is to be understood that the plug 14 may be utilized with any of the forms of my invention previously described.

It will be apparent that pins of various forms and dimensions, yet "embodying my invention, may be produced in the manner described since obviously various changes maybe made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing any of its material advantages, the forms hereinbefore described being merely preferred embodiments thereof.

I claim:

1. A method of making bowling pins, comprising impregnating a strip of unsized paper with concentrated Waste sulfite liquor, winding said paper to form a sub stantially cylindrical blank, and forming a pin from said blank.

2. A method of making bowling pins, contilprising impregnating a strip of paper wit said paper on a mandrel to form a substantially cylindrical blank, removing said mandrel and allowing the paper to dry, and forming a pin fromsaid blank.

3. A method of making bowling pins, comprising impregnating a strip of paper with a suitable adhesive material, winding said paper on a mandred to form a substantially cylindrical blank, removing said mandrel and allowing said paper to dry, forming a pin from said blank, and coating said pin with an elastic waterproof material.

4. A bowling pin, comprising a plurality of concentric layers of unsized paper impregnated with and secured together by a suitable adhesive material.

5. A bowling pin, comprising a plurality of concentric layers of paper impregnated with and secured together by concentrated waste sulfite liquor.

6. A bowling pin, comprising a perma nent wood core and an outer portion con-' sisting of a plurality of concentricv layers of paper secured together by a suitable adhesive material.

7. A bowling pin, comprising a wood core, an outer portion consisting of a plurality of concentric layers together by a suitable adhesive material, and a coating of elastic moisture-resisting material.

8. A bowling pin, comprising a permanent wood core and an outer portion consisting of an endless strip of paper disposed in concentric layers about said core and secured together by a suitable adhesive material.

9. A bowling pin, comprising a plurality of concentric layers of paper secured together by a suitable adhesive material, and a weight disposed in said-pin. W

10. A bowling pin, comprising a plurality of concentric layers of paper secured'togetherby a suitable adhesive material, and a wood core therefor, said core projecting above said paper layers and forming the head of said pin.

FRANK e. CRANE.

Witness H. S. FAIRBANKS.

a suitable adhesive material, Winding 

